Keunecke, Marius Lyzwa, Fryderyk Schwarzbach, Danny Roddatis, Vladimir Gauquelin, Nicolas Müller‐Caspary, Knut Verbeeck, Johann Callori, Sara J. Klose, Frank Jungbauer, Markus Moshnyaga, Vasily 2020-02-05 Heterostructures of strongly correlated oxides demonstrate various intriguing and potentially useful interfacial phenomena. LaMnO3/SrMnO3 superlattices are presented showcasing a new high‐temperature ferromagnetic phase with Curie temperature, T C ≈360 K, caused by electron transfer from the surface of the LaMnO3 donor layer into the neighboring SrMnO3 acceptor layer. As a result, the SrMnO3 (top)/LaMnO3 (bottom) interface shows an enhancement of the magnetization as depth‐profiled by polarized neutron reflectometry. The length scale of charge transfer, λTF ≈2 unit cells, is obtained from in situ growth monitoring by optical ellipsometry, supported by optical simulations, and further confirmed by high resolution electron microscopy and spectroscopy. A model of the inhomogeneous distribution of electron density in LaMnO3/SrMnO3 layers along the growth direction is concluded to account for a complex interplay between ferromagnetic and antiferromagnetic layers in superlattices. application/pdf https://folia.unifr.ch/global/documents/308752 https://folia.unifr.ch/documents/308752/files/lyz_hti.pdf https://folia.unifr.ch/documents/308752/files/lyz_hti_sm.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1002/adfm.201808270 info:eu-repo/semantics/openAccess License undefined Advanced Functional Materials. - 2020, vol. 30, no. 18, p. 1808270 info:eu-repo/classification/udc/53 High‐ T_C interfacial ferromagnetism in SrMnO ₃ LaMnO ₃ superlattices http://purl.org/coar/resource_type/c_6501